Skeletal muscle metabolism in maximal bicycle and treadmill exercise distinguished by using in vivo metabolic freeze method and phosphorus-31 magnetic resonance spectroscopy in normal men.
This study indicates that skeletal muscle metabolism may affect the results of maximal bicycle and treadmill exercise differently, and that maximal bicycle exercise was limited by quadriceps muscle metabolism rather than by cardiopulmonary capacity. In contrast, maximal treadmill exercise was not limited, eliciting more cardiopulmonary reserve and attaining greater peak oxygen uptake than maximal bicycle exercise.
Okita
K
K
Department of Cardiovascular Medicine, Hokkaido University School of Medicine, Sapporo, Japan.
Nishijima
H
H
Yonezawa
K
K
Ohtsubo
M
M
Hanada
A
A
Kohya
T
T
Murakami
T
T
Kitabatake
A
A
D000328:Adult; D015982:Bias; D004734:Energy Metabolism; D005080:Exercise Test / Q000379:methods*; D017079:Exercise Tolerance / Q000502:physiology*; D006801:Humans; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D008297:Male; D018482:Muscle, Skeletal / Q000378:metabolism*; D010101:Oxygen Consumption; D010759:Phosphorus Isotopes; D015203:Reproducibility of Results; D013997:Time Factors
D010759:Phosphorus Isotopes